How to distinguish the imported bearing of true and false?

How to distinguish the imported bearing of true and false? 2018 - 09 - Imported bearing jumbly 23 now on the market, the brand is various, bearing type species from soup to nuts, 'dirty' dealer there have been numerous, so customer want to really want to import bearing products from the market to buy the rest assured, really is not an easy thing. Carelessly will fall into the dealers into, so today, I as far as I am engaged in more than 20 years of experience as an introduction to how to distinguish the imported bearings of true and false, is incorrect, please give more valuable opinions. 1. See packaging packaging appearance, the color of the box, generally false fade easily, color is not straight, the inside of the box color than false really deep gray, the simple sense of box is different also, and is to see the glue on box area will be more obvious, False general torn glue part will stick box bond in the next block) ； Box is thin and the blue color is not straight and easy to rub off the inside of the box white, white box Angle, easy to rub off. To see the bearing of the inner packing material, authenticity of the inner packing pincer-like device is neat, the bag is soft. Fake seal is irregular, not unified, size is differ, the inner packing tape hair hard, anti-rust paint smell of kerosene and yellowing. 2, the bearing bearing finish, below ( △8） Is false, real model is to use laser engraving are not afraid to wipe, stereo sense is strong; False product type fuzzy irregular, stereo sense is not strong, even with grey words, when it hits the laser number one word dizzy rub it off. Bearing chamfer black side, true bearing chamfer is not very dark but with black, grey and false color is more deep, Went up by pickling and sometimes rub off) ； Look at type bearing the above model, the letters of the existing electric erosion of origin and two kinds of laser, feels more smooth, fake it feels not so good, because the process problems, bump is obvious. Or electric corrosion, easy to rub off. Quality goods bearing a look is very beautiful, neat, fake if it is bad. Some fake imported bearing seat of tag is plastic do the poster. Some imported bearings have black Angle, the real is not afraid of water will not rub off, the color is black, Angle of neat. Fake goods dyed Angle special black and not neat. Or will rub off. 3, smell as per brand bearings as per animal will be sending out the different smells. Mainly through the taste of smell bearing anti-rust oil. Quality goods bearing the rust-proof clear and not sticky, almost no taste, smell and counterfeit bearings due to the use of clean gasoline fraud when the iron filings, will remain with the smell of gasoline or kerosene, sometimes also can have aromatic flavour, this is mainly fake bearing cover for cleaning bearing's petrol and spraying of fragrances. 4, to fit the rotation by turning the handle, good bearing rolling is smooth, the noise is very light, and whether there is a vibration vibrating, really high bearing stability; Quality goods bearing production process control is very strict, and the high degree of automation, hardly any debris into the bearing inside, so the bearing work smoothly with no noise, no feeling, and most of the counterfeit products production condition is bad, sometimes in the production process in iron, sand and other impurities in bearing body, turns will have noise. And it is just because of the rolling element bearing or inside and outside the walls of defective, can also cause noise and vibration phenomenon. And bearing the weight of the ( Generally people don't understand) , the same bearing type of true and false bearing weight is different, some false bearing internal and external walls are thin, or scrolling experience less a can save steel material; In addition because the density of imported bearing steel will larger so the weight will be heavier than homebred or fake. 5, the work is to see the rolling element bearing, bearing the smoothness of the surface roughness, as well as the standard of rolling element bearings, fake especially some bigger bearing roller bearing chamfer will be different. Because of fake goods at the time of change, the bearing cleaning, there will be in some subtle residue. And have a dust cover to look at the crack of dust cover is neat. （ Source: WeChat public 'coal mine equipment supplies specialized technical services)